White Rockrose
helianthemum apenninum
Also known as: ["White Cushion Bush","White Sunrose"]
Overview
A low-growing, evergreen shrub native to Europe, known for its small, white, five-petaled flowers that resemble miniature roses.
Benefits & Perks
["low maintenance","fragrant flowers","wildlife attractant (bees, butterflies, birds)","drought tolerant","sun loving"]
Botanical Classification
| Phylum: | Magnoliophyta |
| Class: | Magnoliopsida |
| Order: | Malvales |
| Family: | Cistaceae |
| Genus: | Helianthemum |
| Botanical Name: | Helianthemum apenninum |
Plant Characteristics
Basic Information
- Category: Flowers
- Suitable Location: rock garden, alpine trough, or sunny border
- Suitable For:
- Is Weed: No
- Allergenicity: low
Environmental Needs
- Climate: {"temperatureRange":"–15–35°C"}
- Hardiness: {"zones":"5–8"}
- Misting: rarely required, only if ambient humidity is very low
- Drainage: Fast-draining to prevent root rot.
- Soil Type: Sandy, gritty, and well-draining soil with minimal organic matter.
Maintenance Level
- Maintenance Level: low
- Toughness Level: high
- Pruning Frequency: Annually after flowering or every 2–3 years to rejuvenate.
- Pruning Intensity: Moderate; remove up to one-third of old growth to stimulate new shoots.
Care Details
Ideal Sunlight Coverage:
Full sun (6–8 hours of direct sunlight daily). Adjust for intense summer sun by providing slight shade.
Sunlight Tolerance Tips:
Acclimate gradually to intense sunlight; protect from harsh midday sun; place in a south-facing window indoors.
Care Requirements
Care Difficulty
easymoderate
Sunlight
full sun
Avoid sudden light changes; rotate plant for even growth; use sheer curtains in peak summer.
Watering
every 7–10 days during active growth, reduce in winter
Water deeply but infrequently; avoid waterlogged soil; ensure excellent drainage.
Soil
well-drained, sandy or gravelly soil
pH: Slightly alkaline to neutral (pH 6.5–7.5).
Avoid heavy clay soils; ensure pots have drainage holes; topdress with gravel for extra drainage.
Temperature
Prefers 60–75°F (15–24°C). Tolerates mild frosts but thrives in moderate temperatures.
Protect from frost; avoid drafty areas; maintain moderate humidity.
Fertilizing
every 4–6 weeks during spring and summer, none in winter
Dilute fertilizer to half strength; fertilize only when actively growing; flush soil occasionally to prevent buildup.
Propagation
Methods
Stem cuttings or division.
Step-by-Step Propagation Guide
- Take 3–4 inch cuttings.
- Remove lower leaves.
- Dip in hormone.
- Plant in medium.
- Keep moist.
Best Time: Late spring to early summer when the plant is actively growing.
Environment
Warm (65–75°F), high humidity (70–80%), and bright indirect light.
Medium
Well-draining mix of perlite and peat moss or cactus soil.
Hormone
Recommended to use rooting hormone for faster root development.
Timeline
Roots develop in 3–6 weeks; establish in new pot after 2–3 months.
Tools Needed
Pruning shears, rooting hormone, small pots, misting spray bottle.
Quick Tips
Use healthy, non-flowering stems; maintain humidity with a plastic cover; avoid direct sun.
Pruning & Repotting
Pruning Guide
Method
Pinch back tips; cut just above a leaf node; thin out crowded branches.
Pruning Plan
Prune to maintain shape, encourage bushiness, and remove dead or weak growth.
Tools
Pruning shears, sharp knife, disinfectant.
Checklist
Disinfect tools; prune after flowering; remove dead wood; shape evenly.
Repotting Guide
Best Season
Early spring before new growth begins.
Pot Size
Increase pot size by 1–2 inches in diameter.
Method
Remove plant gently; trim roots if crowded; use fresh, well-draining soil; ensure drainage holes are clear.
Suggestions
Repot every 2–3 years or when roots fill the pot to refresh soil and provide space.
Checklist
Check root bound status; prepare new pot; use fresh soil; water lightly after repotting.
Advanced Care Tips
Watering Mastery
Watering Checklist
Check soil dryness; water deeply; ensure drainage; avoid wetting foliage.
How to Apply Water Properly
Water directly at the root zone until soil is moist but not saturated. Ensure excess water drains freely from the pot. Water in the morning to allow foliage to dry.
Watering Schedule Tips
Water sparingly, allowing soil to dry completely between waterings. Reduce frequency in winter to once every 3–4 weeks.
Soil Improvement
Add coarse sand, perlite, or pumice to improve drainage; incorporate limestone to raise pH if needed.
Temperature Stress Management
Signs of Temperature Issues
Wilting, leaf drop, or stunted growth in extreme heat or cold; yellowing in cold stress.
Cold Stress
Slows growth; may cause root damage in prolonged freezing conditions.
Solution: Move to a sheltered location; insulate roots with mulch; avoid overwatering in cold.
Hot Stress
Leaves may scorch, wilt, or drop; growth may cease in excessive heat.
Solution: Provide afternoon shade; increase air circulation; water early in the day.
Fertilizing Guide
Fertilizing Checklist
Check growth phase; dilute fertilizer; apply to moist soil; avoid contact with roots.
Fertilizing Method
Use a balanced, diluted liquid fertilizer every 4–6 weeks during spring and summer. Avoid feeding in fall and winter.
Common Problems & Solutions
Toxicity Warning
Cats
Non-toxicHelianthemum apenninum is not known to be toxic to cats. There are no reported adverse effects from ingestion or contact with this plant.
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Dogs
Non-toxicHelianthemum apenninum is not known to be toxic to dogs. There are no reported adverse effects from ingestion or contact with this plant.
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Humans
Non-toxicHelianthemum apenninum is not known to exhibit toxic properties to humans. It is generally considered safe for handling and consumption in typical amounts.
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Frequently Asked Questions
Q: How often should Helianthemum apenninum be watered?
A: It is drought-tolerant and requires minimal watering, especially once established. Water sparingly during dry periods, allowing the soil to dry out between waterings.
Q: Does Helianthemum apenninum attract wildlife?
A: Yes, it attracts bees, butterflies, and other pollinators due to its fragrant flowers.
Q: Can Helianthemum apenninum be grown in containers?
A: Yes, it can be grown in containers, provided they have excellent drainage and are placed in full sun.
Quick Reference
| Family: | Cistaceae |
| Care: | easy |
| Light: | full sun |
| Water: | every 7–10 days during activ |
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